Question

ОЧЕНЬ СРОЧНО!!!!! 1)2 3/4*1/3+5 2/3*1/42) 3 2/5*2-1/5*43)5 13/30-(2 1/10+1/5)​

Answer 1

Ответ:

1) 2 3/4 * 1/3 = 11/4 * 1/3 = 11/12 + 5 2/3*1/4 = 11/12 + 17/3 * 1/4 = 11/12 + 17/12 = 28/12

2) 3 2/5*2 = 17/5 * 2 = 34/5 - 1/5 * 4 = 34/5 - 4/5 = 30/5 = 6

3) 5 13/30 - (2 1/10+1/5) = 78/30 - (21/10 + 1/5 ) = 78/30 - (21/10 + 2/10)= 78/30--23/10= 78/30 - 72/30 = 6/30

Answer 2

ответ:

1) 7/3

2) 6

3) 47/15

Answer 3

1. To solve the expression 2 3/4 * 1/3 + 5 2/3 * 1/4, we can simplify each multiplication separately and then add the results.

First, let's simplify the first multiplication: 2 3/4 * 1/3 = (8/4 + 3/4) * 1/3 = 11/4 * 1/3 = 11/12

Now, let's simplify the second multiplication: 5 2/3 * 1/4 = (16/3 + 2/3) * 1/4 = 18/3 * 1/4 = 6/1 * 1/4 = 6/4 = 3/2

Finally, let's add the results together: 11/12 + 3/2 = (11/12 * 2/2) + 3/2 = 22/24 + 36/24 = 58/24 = 29/12

Therefore, the result of the expression 2 3/4 * 1/3 + 5 2/3 * 1/4 is 29/12.

2. To solve the expression 3 2/5 * 2 - 1/5 * 4, we can simplify each multiplication separately and then subtract the results.

First, let's simplify the first multiplication: 3 2/5 * 2 = (17/5) * 2 = 34/5

Now, let's simplify the second multiplication: 1/5 * 4 = 4/5

Finally, let's subtract the results: 34/5 - 4/5 = (34/5 - 4/5) = 30/5 = 6

Therefore, the result of the expression 3 2/5 * 2 - 1/5 * 4 is 6.

3. To solve the expression 5 13/30 - (2 1/10 + 1/5), we can simplify each part separately and then perform the subtraction.

First, let's simplify the addition inside the parentheses: 2 1/10 + 1/5 = (21/10 + 2/10) + 1/5 = 23/10 + 1/5 = (23/10 * 1/1) + (1/5 * 2/2) = 23/10 + 2/10 = 25/10 = 5/2

Now, let's subtract the result inside the parentheses from the first part of the expression: 5 13/30 - 5/2 = (5 * 30 + 13) / 30 - (5 * 15) / (2 * 15) = (150 + 13) / 30 - (75) / (30) = 163/30 - 75/30 = (163 - 75) / 30 = 88/30 = 44/15

Therefore, the result of the expression 5 13/30 - (2 1/10 + 1/5) is 44/15.